Bairdia jeromei, Forel, 2012

Forel, Marie-Béatrice, 2012, Ostracods (Crustacea) associated with microbialites across the Permian-Triassic boundary in Dajiang (Guizhou Province, South China), European Journal of Taxonomy 19, pp. 1-34 : 11-13

publication ID

https://doi.org/ 10.5852/ejt.2012.19

publication LSID

lsid:zoobank.org:pub:893DB151-7B86-485C-932F-A01C57B20316

DOI

https://doi.org/10.5281/zenodo.3858784

persistent identifier

https://treatment.plazi.org/id/F4F902E4-E008-4156-9124-CF5CDE4BA71A

taxon LSID

lsid:zoobank.org:act:F4F902E4-E008-4156-9124-CF5CDE4BA71A

treatment provided by

Carolina

scientific name

Bairdia jeromei
status

sp. nov.

Bairdia jeromei sp. nov.

Fig. 4 View Fig G-P

Diagnosis

Massive and subrectangular species of Bairdia , with DB and VB subparallel, long DB (~ 60% of Lmax), rhombic dorsal view.

Etymology

Personal dedication to Jérôme Cougoul.

Material examined

Holotype

One carapace ( Fig. 4G View Fig ), sample 05PAJ43, collection number P6M2945.

Paratype

One carapace ( Fig. 4J View Fig ), sample 05PAJ43, collection number P6M2948.

Other material

10 carapaces, several fragments. The species is known from its type locality only.

Type locality

Wujiaping and Daye Formations (samples 05PAJ23, 25, 26, 28, 32, 42, 43), Dajiang section (25°33’56’’N- 106°39’41’’E), Guizhou Province, South China, Changhsingian and Griesbachian, Late Permian and Early Triassic.

Measurements ( Fig. 6 View Fig )

L = 722 – 1024 μm; H = 410 – 597 μm; H/L = 0.56 – 0.64.

Description

Carapace massive, elongated and subrectangular in lateral view; surface smooth; LV larger than RV, overlapping at dorsum and VB; bairdian beaks at AB and PB poorly expressed; PDB, DB and ADB distinct at both valves; PDB steeply bent backward, long (~ 65% of Hmax) and slightly convex; DB long (~60% of Lmax) and gently convex; ADB slightly concave at RV, shorter than PDB; ventral part rounded; VB long, convex at LV, concave at RV; AVB and PVB rounded, AVB longer than PVB; carapace slightly postplete to amplete; Lmax below mid-H; dorsal view rhombic with LV’s Wmax in posterior 1/3 of Lmax, in anterior 1/3 at RV.

Remarks

In lateral view, Bairdia jeromei sp. nov. is similar to Orthobairdia sp.1 sensu Crasquin et al., 2010 from the Permian of the Meishan section, Zhejiang Province, South China ( Crasquin et al. 2010) but here the dorsal view clearly precludes the generic attribution to Orthobairdia .

Kingdom

Animalia

Phylum

Arthropoda

Class

Ostracoda

Order

Podocopida

SuperFamily

Bairdioidea

Family

Bairdiidae

Genus

Bairdia

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